/* ==========================================================================
   Animations & Micro-interactions
   (Luxury Bridal Tone - Elegant, Subtle, High-Performing)
   ========================================================================== */

/* Fade-in Scroll Animations (Triggered via JS adding .is-visible) */
.js-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.js-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.js-reveal-delay-1 { transition-delay: 0.15s; }
.js-reveal-delay-2 { transition-delay: 0.3s; }
.js-reveal-delay-3 { transition-delay: 0.45s; }
.js-reveal-delay-4 { transition-delay: 0.6s; }

/* Shimmer Light Effect on CTA Buttons */
.c-btn--gold {
  position: relative;
  overflow: hidden;
}

.c-btn--gold::after {
  content: '';
  position: absolute;
  top: -50%;
  left: -60%;
  width: 25%;
  height: 200%;
  background: linear-gradient(
    60deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0.5) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  transform: rotate(25deg);
  animation: btnShimmer 4.5s infinite;
}

@keyframes btnShimmer {
  0%, 65% {
    left: -60%;
  }
  100% {
    left: 140%;
  }
}

/* Floating Animation for FV Platinum Card */
@keyframes cardFloat3D {
  0%, 100% {
    transform: translateY(0) rotate(0deg) scale(1);
    box-shadow: 0 16px 36px rgba(15, 23, 42, 0.18);
  }
  50% {
    transform: translateY(-10px) rotate(1.5deg) scale(1.02);
    box-shadow: 0 24px 48px rgba(194, 80, 100, 0.22);
  }
}

.u-card-float-3d {
  animation: cardFloat3D 6s ease-in-out infinite;
}

/* Breathing Animation for Bubbles (マイナビ調 バブルの有機的な呼吸) */
@keyframes bubbleBreath1 {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-6px) scale(1.02); }
}

@keyframes bubbleBreath2 {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(5px) scale(0.98); }
}

.c-bubble-item--center { animation: bubbleBreath1 5s ease-in-out infinite; }
.c-bubble-item--top-left { animation: bubbleBreath2 6s ease-in-out infinite 0.5s; }
.c-bubble-item--top-right { animation: bubbleBreath1 5.5s ease-in-out infinite 1s; }
.c-bubble-item--bottom { animation: bubbleBreath2 6.5s ease-in-out infinite 1.5s; }

/* Sparkle Rotating & Pulsing */
@keyframes sparkleGlow {
  0%, 100% {
    transform: scale(1) rotate(0deg);
    opacity: 0.8;
  }
  50% {
    transform: scale(1.2) rotate(45deg);
    opacity: 1;
    filter: drop-shadow(0 0 6px rgba(223, 183, 108, 0.8));
  }
}

.u-sparkle {
  animation: sparkleGlow 3s ease-in-out infinite;
  display: inline-block;
}

.u-sparkle--delay {
  animation-delay: 1.5s;
}

/* Respect user's reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  .js-reveal {
    transition: none;
    opacity: 1;
    transform: none;
  }
  .u-card-float-3d,
  .c-bubble-item--center,
  .c-bubble-item--top-left,
  .c-bubble-item--top-right,
  .c-bubble-item--bottom,
  .u-sparkle,
  .c-btn--gold::after {
    animation: none;
  }
}